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annotate src/mesh.cc @ 16:9e4a28063394

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cl compiler segfaults...
author John Tsiombikas <nuclear@member.fsf.org>
date Mon, 09 Aug 2010 04:18:21 +0100
parents 754faf15ba36
children 8baea9b66b50
rev   line source
nuclear@6 1 #include <stdio.h>
nuclear@6 2 #include <stdlib.h>
nuclear@6 3 #include <string.h>
John@15 4 #include <math.h>
nuclear@6 5 #include <errno.h>
nuclear@8 6 #include <limits.h>
nuclear@6 7 #include <string>
nuclear@6 8 #include <vector>
nuclear@6 9 #include <map>
nuclear@6 10 #include "mesh.h"
nuclear@6 11
John@11 12 #ifndef PATH_MAX
John@11 13 #define PATH_MAX 512
John@11 14 #endif
John@11 15
nuclear@6 16 using namespace std;
nuclear@6 17
nuclear@8 18 #define COMMANDS \
nuclear@6 19 CMD(V), \
nuclear@6 20 CMD(VN), \
nuclear@6 21 CMD(VT), \
nuclear@6 22 CMD(F), \
nuclear@6 23 CMD(O), \
nuclear@6 24 CMD(G), \
nuclear@6 25 CMD(MTLLIB), \
nuclear@6 26 CMD(USEMTL), \
nuclear@6 27 CMD(NEWMTL), \
nuclear@6 28 CMD(KA), \
nuclear@6 29 CMD(KD), \
nuclear@6 30 CMD(KS), \
nuclear@16 31 CMD(KR), \
nuclear@6 32 CMD(NS), \
nuclear@6 33 CMD(NI), \
nuclear@6 34 CMD(D), \
nuclear@6 35 CMD(TR), \
nuclear@6 36 CMD(MAP_KD), \
nuclear@6 37 CMD(MAP_KS), \
nuclear@6 38 CMD(MAP_NS), \
nuclear@6 39 CMD(MAP_D), \
nuclear@6 40 CMD(REFL), \
nuclear@6 41 CMD(BUMP)
nuclear@6 42
nuclear@6 43 #define CMD(x) CMD_##x
nuclear@6 44 enum {
nuclear@6 45 COMMANDS,
nuclear@6 46 CMD_UNK
nuclear@6 47 };
nuclear@6 48 #undef CMD
nuclear@6 49
nuclear@6 50 #define CMD(x) #x
nuclear@6 51 static const char *cmd_names[] = {
nuclear@6 52 COMMANDS,
nuclear@6 53 0
nuclear@6 54 };
nuclear@6 55 #undef CMD
nuclear@6 56
nuclear@6 57 struct Vector3 {
nuclear@6 58 float x, y, z;
nuclear@6 59
nuclear@6 60 Vector3() { x = y = z = 0.0; }
nuclear@6 61 Vector3(float a, float b, float c) { x = a; y = b; z = c; }
nuclear@6 62 };
nuclear@6 63
nuclear@6 64 struct Vector2 {
nuclear@6 65 float x, y;
nuclear@6 66
nuclear@6 67 Vector2() { x = y = 0.0; }
nuclear@6 68 Vector2(float a, float b) { x = a; y = b; }
nuclear@6 69 };
nuclear@6 70
nuclear@6 71 struct obj_face {
nuclear@6 72 int elem;
nuclear@6 73 int v[4], n[4], t[4];
nuclear@6 74 };
nuclear@6 75
nuclear@6 76 struct obj_file {
nuclear@6 77 string cur_obj, cur_mat;
nuclear@6 78 vector<Vector3> v, vn, vt;
nuclear@6 79 vector<obj_face> f;
nuclear@6 80 };
nuclear@6 81
nuclear@6 82 struct obj_mat {
nuclear@6 83 string name; // newmtl <name>
nuclear@6 84 Vector3 ambient, diffuse, specular; // Ka, Kd, Ks
nuclear@6 85 float shininess; // Ns
nuclear@6 86 float ior; // Ni
nuclear@6 87 float alpha; // d, Tr
nuclear@16 88 float refl; // Kr (my extesnsion)
nuclear@6 89
nuclear@6 90 string tex_dif, tex_spec, tex_shin, tex_alpha; // map_Kd, map_Ks, map_Ns, map_d
nuclear@6 91 string tex_refl; // refl -type sphere|cube file
nuclear@6 92 string tex_bump; // bump
nuclear@6 93
nuclear@6 94 obj_mat() { reset(); }
nuclear@6 95
nuclear@6 96 void reset() {
nuclear@6 97 ambient = diffuse = Vector3(0.5, 0.5, 0.5);
nuclear@6 98 specular = Vector3(0.0, 0.0, 0.0);
nuclear@6 99 name = tex_dif = tex_spec = tex_shin = tex_alpha = tex_refl = tex_bump = "";
nuclear@6 100 shininess = 0;
nuclear@6 101 ior = alpha = 1;
nuclear@6 102 }
nuclear@6 103 };
nuclear@6 104
nuclear@6 105 static bool read_materials(FILE *fp, vector<obj_mat> *vmtl);
nuclear@6 106 static Mesh *cons_mesh(obj_file *obj);
nuclear@6 107
nuclear@6 108 static int get_cmd(char *str);
nuclear@6 109 static bool is_int(const char *str);
nuclear@6 110 static bool is_float(const char *str);
nuclear@6 111 static bool parse_vec(Vector3 *vec);
nuclear@6 112 static bool parse_color(Vector3 *col);
nuclear@6 113 static bool parse_face(obj_face *face);
nuclear@6 114 static const char *parse_map();
nuclear@6 115
nuclear@6 116 static bool find_file(char *res, int sz, const char *fname, const char *path = ".", const char *mode = "rb");
nuclear@6 117 static const char *dirname(const char *str);
nuclear@6 118
nuclear@6 119 static map<string, int> matnames;
nuclear@6 120
John@15 121
John@15 122 #define FEQ(a, b) (fabs((a) - (b)) < 1e-8)
John@15 123 bool Face::operator ==(const Face &f) const
John@15 124 {
John@15 125 for(int i=0; i<3; i++) {
John@15 126 for(int j=0; j<3; j++) {
John@15 127 if(!FEQ(v[i].pos[j], f.v[i].pos[j])) {
John@15 128 return false;
John@15 129 }
John@15 130 if(!FEQ(v[i].normal[j], f.v[i].normal[j])) {
John@15 131 return false;
John@15 132 }
John@15 133 }
John@15 134 if(!FEQ(normal[i], f.normal[i])) {
John@15 135 return false;
John@15 136 }
John@15 137 }
John@15 138 return true;
John@15 139 }
John@15 140
nuclear@13 141 bool Scene::add_mesh(Mesh *m)
nuclear@13 142 {
nuclear@13 143 // make sure triangles have material ids
nuclear@13 144 for(size_t i=0; i<m->faces.size(); i++) {
nuclear@13 145 m->faces[i].matid = m->matid;
nuclear@13 146 }
nuclear@13 147 meshes.push_back(m);
nuclear@13 148 return true;
nuclear@13 149 }
nuclear@13 150
John@14 151 int Scene::get_num_meshes() const
John@14 152 {
John@14 153 return (int)meshes.size();
John@14 154 }
John@14 155
nuclear@13 156 int Scene::get_num_faces() const
nuclear@13 157 {
nuclear@13 158 int num_faces = 0;
nuclear@13 159 for(size_t i=0; i<meshes.size(); i++) {
nuclear@13 160 num_faces += meshes[i]->faces.size();
nuclear@13 161 }
nuclear@13 162 printf("get_num_faces() = %d\n", num_faces);
nuclear@13 163 return num_faces;
nuclear@13 164 }
nuclear@13 165
John@14 166 int Scene::get_num_materials() const
John@14 167 {
John@14 168 return (int)matlib.size();
John@14 169 }
John@14 170
John@14 171 Material *Scene::get_materials()
John@14 172 {
John@14 173 if(matlib.empty()) {
John@14 174 return 0;
John@14 175 }
John@14 176 return &matlib[0];
John@14 177 }
John@14 178
John@14 179 const Material *Scene::get_materials() const
John@14 180 {
John@14 181 if(matlib.empty()) {
John@14 182 return 0;
John@14 183 }
John@14 184 return &matlib[0];
John@14 185 }
John@14 186
nuclear@6 187
nuclear@6 188 #define INVALID_IDX INT_MIN
nuclear@6 189
nuclear@6 190 #define SEP " \t\n\r\v"
nuclear@6 191 #define BUF_SZ 512
nuclear@6 192
nuclear@6 193 bool Scene::load(const char *fname)
nuclear@6 194 {
nuclear@6 195 FILE *fp;
nuclear@6 196
nuclear@6 197 if(!(fp = fopen(fname, "rb"))) {
nuclear@6 198 fprintf(stderr, "failed to open %s: %s\n", fname, strerror(errno));
nuclear@6 199 return false;
nuclear@6 200 }
nuclear@6 201
nuclear@6 202 bool res = load(fp);
nuclear@6 203 fclose(fp);
nuclear@6 204 return res;
nuclear@6 205 }
nuclear@6 206
nuclear@6 207 bool Scene::load(FILE *fp)
nuclear@6 208 {
nuclear@6 209 static int seq;
nuclear@6 210 char cur_name[16];
nuclear@6 211
nuclear@6 212 obj_file obj;
nuclear@8 213
nuclear@6 214 sprintf(cur_name, "default%02d.obj", seq++);
nuclear@6 215 obj.cur_obj = cur_name;
nuclear@6 216
nuclear@6 217 int prev_cmd = 0, obj_added = 0;
nuclear@6 218 for(;;) {
nuclear@6 219 Vector3 vec;
nuclear@6 220 obj_face face;
nuclear@8 221
nuclear@6 222 char line[BUF_SZ];
nuclear@6 223 fgets(line, sizeof line, fp);
nuclear@6 224 if(feof(fp)) {
nuclear@6 225 break;
nuclear@6 226 }
nuclear@6 227
nuclear@6 228 char *tok;
nuclear@6 229 if(!(tok = strtok(line, SEP))) {
nuclear@6 230 continue; // ignore empty lines
nuclear@6 231 }
nuclear@6 232
nuclear@6 233 int cmd;
nuclear@6 234 if((cmd = get_cmd(tok)) == -1) {
nuclear@6 235 continue; // ignore unknown commands ...
nuclear@6 236 }
nuclear@6 237
nuclear@6 238 switch(cmd) {
nuclear@6 239 case CMD_V:
nuclear@6 240 if(!parse_vec(&vec)) {
nuclear@6 241 continue;
nuclear@6 242 }
nuclear@6 243 obj.v.push_back(vec);
nuclear@6 244 break;
nuclear@6 245
nuclear@6 246 case CMD_VN:
nuclear@6 247 if(!parse_vec(&vec)) {
nuclear@6 248 continue;
nuclear@6 249 }
nuclear@6 250 obj.vn.push_back(vec);
nuclear@6 251 break;
nuclear@6 252
nuclear@6 253 case CMD_VT:
nuclear@6 254 if(!parse_vec(&vec)) {
nuclear@6 255 continue;
nuclear@6 256 }
nuclear@6 257 vec.y = 1.0 - vec.y;
nuclear@6 258 obj.vt.push_back(vec);
nuclear@6 259 break;
nuclear@6 260
nuclear@6 261 case CMD_O:
nuclear@6 262 case CMD_G:
nuclear@6 263 if(prev_cmd == CMD_O || prev_cmd == CMD_G) {
nuclear@6 264 break; // just in case we've got both of them in a row
nuclear@6 265 }
nuclear@6 266 /* if we have any previous data, group them up, add the object
nuclear@6 267 * and continue with the new one...
nuclear@6 268 */
nuclear@6 269 if(!obj.f.empty()) {
nuclear@6 270 Mesh *mesh = cons_mesh(&obj);
nuclear@6 271 mesh->matid = matnames[obj.cur_mat];
nuclear@13 272 add_mesh(mesh);
nuclear@6 273 obj_added++;
nuclear@6 274
nuclear@6 275 obj.f.clear(); // clean the face list
nuclear@6 276 }
nuclear@6 277 if((tok = strtok(0, SEP))) {
nuclear@6 278 obj.cur_obj = tok;
nuclear@6 279 } else {
nuclear@6 280 sprintf(cur_name, "default%02d.obj", seq++);
nuclear@6 281 obj.cur_obj = cur_name;
nuclear@6 282 }
nuclear@6 283 break;
nuclear@6 284
nuclear@6 285 case CMD_MTLLIB:
nuclear@6 286 if((tok = strtok(0, SEP))) {
nuclear@6 287 char path[PATH_MAX];
nuclear@6 288
nuclear@6 289 sprintf(path, ".:%s", dirname(tok));
nuclear@6 290 if(!find_file(path, PATH_MAX, tok, path)) {
nuclear@6 291 fprintf(stderr, "material library not found: %s\n", tok);
nuclear@6 292 continue;
nuclear@6 293 }
nuclear@6 294
nuclear@6 295 FILE *mfile;
nuclear@6 296 if(!(mfile = fopen(path, "rb"))) {
nuclear@6 297 fprintf(stderr, "failed to open material library: %s\n", path);
nuclear@6 298 continue;
nuclear@6 299 }
nuclear@6 300
nuclear@6 301 // load all materials of the mtl file into a vector
nuclear@6 302 vector<obj_mat> vmtl;
nuclear@6 303 if(!read_materials(mfile, &vmtl)) {
nuclear@6 304 continue;
nuclear@6 305 }
nuclear@6 306 fclose(mfile);
nuclear@6 307
nuclear@6 308 // and add them all to the scene
nuclear@6 309 for(size_t i=0; i<vmtl.size(); i++) {
nuclear@6 310 Material mat;
nuclear@6 311
nuclear@6 312 mat.kd[0] = vmtl[i].diffuse.x;
nuclear@6 313 mat.kd[1] = vmtl[i].diffuse.y;
nuclear@6 314 mat.kd[2] = vmtl[i].diffuse.z;
nuclear@6 315
nuclear@6 316 mat.ks[0] = vmtl[i].specular.x;
nuclear@6 317 mat.ks[1] = vmtl[i].specular.y;
nuclear@6 318 mat.ks[2] = vmtl[i].specular.z;
nuclear@6 319
nuclear@6 320 mat.kt = 1.0 - vmtl[i].alpha;
nuclear@16 321 mat.kr = vmtl[i].refl;
nuclear@6 322 mat.spow = vmtl[i].shininess;
nuclear@8 323
nuclear@13 324 matlib.push_back(mat);
nuclear@6 325 matnames[vmtl[i].name] = i;
nuclear@6 326 }
nuclear@6 327 }
nuclear@6 328 break;
nuclear@6 329
nuclear@6 330 case CMD_USEMTL:
nuclear@6 331 if((tok = strtok(0, SEP))) {
nuclear@6 332 obj.cur_mat = tok;
nuclear@6 333 } else {
nuclear@6 334 obj.cur_mat = "";
nuclear@6 335 }
nuclear@6 336 break;
nuclear@6 337
nuclear@6 338 case CMD_F:
nuclear@6 339 if(!parse_face(&face)) {
nuclear@6 340 continue;
nuclear@6 341 }
nuclear@6 342
nuclear@6 343 // convert negative indices to regular indices
nuclear@6 344 for(int i=0; i<4; i++) {
nuclear@6 345 if(face.v[i] < 0 && face.v[i] != INVALID_IDX) {
nuclear@6 346 face.v[i] = obj.v.size() + face.v[i];
nuclear@6 347 }
nuclear@6 348 if(face.n[i] < 0 && face.n[i] != INVALID_IDX) {
nuclear@6 349 face.n[i] = obj.vn.size() + face.n[i];
nuclear@6 350 }
nuclear@6 351 if(face.t[i] < 0 && face.t[i] != INVALID_IDX) {
nuclear@6 352 face.t[i] = obj.vt.size() + face.t[i];
nuclear@6 353 }
nuclear@6 354 }
nuclear@6 355
nuclear@6 356 // break quads into triangles if needed
nuclear@6 357 obj.f.push_back(face);
nuclear@6 358 if(face.elem == 4) {
nuclear@6 359 face.v[1] = face.v[2];
nuclear@6 360 face.n[1] = face.n[2];
nuclear@6 361 face.t[1] = face.t[2];
nuclear@6 362
nuclear@6 363 face.v[2] = face.v[3];
nuclear@6 364 face.n[2] = face.n[3];
nuclear@6 365 face.t[2] = face.t[3];
nuclear@6 366
nuclear@6 367 obj.f.push_back(face);
nuclear@6 368 }
nuclear@6 369 break;
nuclear@6 370
nuclear@6 371 default:
nuclear@6 372 break; // ignore unknown commands
nuclear@6 373 }
nuclear@6 374
nuclear@6 375 prev_cmd = cmd;
nuclear@6 376 }
nuclear@6 377
nuclear@6 378 // reached end of file...
nuclear@6 379 if(!obj.f.empty()) {
nuclear@6 380 Mesh *mesh = cons_mesh(&obj);
nuclear@6 381 mesh->matid = matnames[obj.cur_mat];
nuclear@13 382 add_mesh(mesh);
nuclear@6 383 obj_added++;
nuclear@6 384 }
nuclear@6 385
nuclear@6 386 return obj_added > 0;
nuclear@6 387 }
nuclear@6 388
nuclear@6 389 static Mesh *cons_mesh(obj_file *obj)
nuclear@6 390 {
nuclear@6 391 Mesh *mesh;
nuclear@6 392
nuclear@6 393 // need at least one of each element
nuclear@6 394 bool added_norm = false, added_tc = false;
nuclear@6 395 if(obj->vn.empty()) {
nuclear@6 396 obj->vn.push_back(Vector3(0, 0, 0));
nuclear@6 397 added_norm = true;
nuclear@6 398 }
nuclear@6 399 if(obj->vt.empty()) {
nuclear@6 400 obj->vt.push_back(Vector3(0, 0, 0));
nuclear@6 401 added_tc = true;
nuclear@6 402 }
nuclear@6 403
nuclear@6 404 mesh = new Mesh;
nuclear@6 405
nuclear@6 406 for(size_t i=0; i<obj->f.size(); i++) {
nuclear@6 407 Face face;
nuclear@6 408
nuclear@6 409 for(int j=0; j<3; j++) {
nuclear@6 410 obj_face *f = &obj->f[i];
nuclear@6 411
nuclear@6 412 face.v[j].pos[0] = obj->v[f->v[j]].x;
nuclear@6 413 face.v[j].pos[1] = obj->v[f->v[j]].y;
nuclear@6 414 face.v[j].pos[2] = obj->v[f->v[j]].z;
nuclear@13 415 face.v[j].pos[3] = 0.0;
nuclear@6 416
nuclear@6 417 int nidx = f->n[j] < 0 ? 0 : f->n[j];
nuclear@6 418 face.v[j].normal[0] = obj->vn[nidx].x;
nuclear@6 419 face.v[j].normal[1] = obj->vn[nidx].y;
nuclear@6 420 face.v[j].normal[2] = obj->vn[nidx].z;
nuclear@13 421 face.v[j].normal[3] = 0.0;
nuclear@6 422
nuclear@6 423 int tidx = f->t[j] < 0 ? 0 : f->t[j];
nuclear@6 424 face.v[j].tex[0] = obj->vt[tidx].x;
nuclear@6 425 face.v[j].tex[1] = obj->vt[tidx].y;
nuclear@6 426 }
nuclear@13 427
nuclear@13 428 face.normal[0] = face.v[0].normal[0];
nuclear@13 429 face.normal[1] = face.v[1].normal[1];
nuclear@13 430 face.normal[2] = face.v[2].normal[2];
nuclear@13 431 face.normal[3] = 0.0;
nuclear@13 432
nuclear@6 433 mesh->faces.push_back(face);
nuclear@6 434 }
nuclear@6 435
nuclear@6 436 if(added_norm) {
nuclear@6 437 obj->vn.pop_back();
nuclear@6 438 }
nuclear@6 439 if(added_tc) {
nuclear@6 440 obj->vt.pop_back();
nuclear@6 441 }
nuclear@8 442
nuclear@6 443 return mesh;
nuclear@6 444 }
nuclear@6 445
nuclear@6 446 static bool read_materials(FILE *fp, vector<obj_mat> *vmtl)
nuclear@6 447 {
nuclear@6 448 obj_mat mat;
nuclear@6 449
nuclear@6 450 for(;;) {
nuclear@6 451 char line[BUF_SZ];
nuclear@6 452 fgets(line, sizeof line, fp);
nuclear@6 453 if(feof(fp)) {
nuclear@6 454 break;
nuclear@6 455 }
nuclear@6 456
nuclear@6 457 char *tok;
nuclear@6 458 if(!(tok = strtok(line, SEP))) {
nuclear@6 459 continue;
nuclear@6 460 }
nuclear@6 461
nuclear@6 462 int cmd;
nuclear@6 463 if((cmd = get_cmd(tok)) == -1) {
nuclear@6 464 continue;
nuclear@6 465 }
nuclear@6 466
nuclear@6 467 switch(cmd) {
nuclear@6 468 case CMD_NEWMTL:
nuclear@6 469 // add the previous material, and start a new one
nuclear@6 470 if(mat.name.length() > 0) {
nuclear@13 471 printf("Adding material: %s\n", mat.name.c_str());
nuclear@6 472 vmtl->push_back(mat);
nuclear@6 473 mat.reset();
nuclear@6 474 }
nuclear@6 475 if((tok = strtok(0, SEP))) {
nuclear@6 476 mat.name = tok;
nuclear@6 477 }
nuclear@6 478 break;
nuclear@6 479
nuclear@6 480 case CMD_KA:
nuclear@6 481 parse_color(&mat.ambient);
nuclear@6 482 break;
nuclear@6 483
nuclear@6 484 case CMD_KD:
nuclear@6 485 parse_color(&mat.diffuse);
nuclear@6 486 break;
nuclear@6 487
nuclear@6 488 case CMD_KS:
nuclear@6 489 parse_color(&mat.specular);
nuclear@6 490 break;
nuclear@6 491
nuclear@16 492 case CMD_KR:
nuclear@16 493 if((tok = strtok(0, SEP)) && is_float(tok)) {
nuclear@16 494 mat.refl = atof(tok);
nuclear@16 495 }
nuclear@16 496 break;
nuclear@16 497
nuclear@6 498 case CMD_NS:
nuclear@6 499 if((tok = strtok(0, SEP)) && is_float(tok)) {
nuclear@6 500 mat.shininess = atof(tok);
nuclear@6 501 }
nuclear@6 502 break;
nuclear@6 503
nuclear@6 504 case CMD_NI:
nuclear@6 505 if((tok = strtok(0, SEP)) && is_float(tok)) {
nuclear@6 506 mat.ior = atof(tok);
nuclear@6 507 }
nuclear@6 508 break;
nuclear@6 509
nuclear@6 510 case CMD_D:
nuclear@6 511 case CMD_TR:
nuclear@6 512 {
nuclear@6 513 Vector3 c;
nuclear@6 514 if(parse_color(&c)) {
nuclear@6 515 mat.alpha = cmd == CMD_D ? c.x : 1.0 - c.x;
nuclear@6 516 }
nuclear@6 517 }
nuclear@6 518 break;
nuclear@6 519
nuclear@6 520 case CMD_MAP_KD:
nuclear@6 521 mat.tex_dif = parse_map();
nuclear@6 522 break;
nuclear@6 523
nuclear@6 524 default:
nuclear@6 525 break;
nuclear@6 526 }
nuclear@6 527 }
nuclear@6 528
nuclear@6 529 if(mat.name.length() > 0) {
nuclear@13 530 printf("Adding material: %s\n", mat.name.c_str());
nuclear@6 531 vmtl->push_back(mat);
nuclear@6 532 }
nuclear@6 533 return true;
nuclear@6 534 }
nuclear@6 535
nuclear@6 536 static int get_cmd(char *str)
nuclear@6 537 {
nuclear@6 538 char *s = str;
nuclear@8 539 while((*s = toupper(*s))) s++;
nuclear@6 540
nuclear@6 541 for(int i=0; cmd_names[i]; i++) {
nuclear@6 542 if(strcmp(str, cmd_names[i]) == 0) {
nuclear@6 543 return i;
nuclear@6 544 }
nuclear@6 545 }
nuclear@6 546 return CMD_UNK;
nuclear@6 547 }
nuclear@6 548
nuclear@6 549 static bool is_int(const char *str)
nuclear@6 550 {
nuclear@6 551 char *tmp;
nuclear@6 552 strtol(str, &tmp, 10);
nuclear@6 553 return tmp != str;
nuclear@6 554 }
nuclear@6 555
nuclear@6 556 static bool is_float(const char *str)
nuclear@6 557 {
nuclear@6 558 char *tmp;
nuclear@6 559 strtod(str, &tmp);
nuclear@6 560 return tmp != str;
nuclear@6 561 }
nuclear@6 562
nuclear@6 563 static bool parse_vec(Vector3 *vec)
nuclear@6 564 {
nuclear@6 565 for(int i=0; i<3; i++) {
nuclear@6 566 char *tok;
nuclear@6 567
nuclear@6 568 if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
nuclear@6 569 if(i < 2) {
nuclear@6 570 return false;
nuclear@6 571 }
nuclear@6 572 vec->z = 0.0;
nuclear@6 573 } else {
nuclear@6 574 float v = atof(tok);
nuclear@6 575
nuclear@6 576 switch(i) {
nuclear@6 577 case 0:
nuclear@6 578 vec->x = v;
nuclear@6 579 break;
nuclear@6 580 case 1:
nuclear@6 581 vec->y = v;
nuclear@6 582 break;
nuclear@6 583 case 2:
nuclear@6 584 vec->z = v;
nuclear@6 585 break;
nuclear@6 586 }
nuclear@6 587 }
nuclear@6 588 }
nuclear@6 589 return true;
nuclear@6 590 }
nuclear@6 591
nuclear@6 592 static bool parse_color(Vector3 *col)
nuclear@6 593 {
nuclear@6 594 for(int i=0; i<3; i++) {
nuclear@6 595 char *tok;
nuclear@6 596
nuclear@6 597 if(!(tok = strtok(0, SEP)) || !is_float(tok)) {
nuclear@6 598 col->y = col->z = col->x;
nuclear@6 599 return i > 0 ? true : false;
nuclear@6 600 }
nuclear@6 601
nuclear@6 602 float v = atof(tok);
nuclear@6 603 switch(i) {
nuclear@6 604 case 0:
nuclear@6 605 col->x = v;
nuclear@6 606 break;
nuclear@6 607 case 1:
nuclear@6 608 col->y = v;
nuclear@6 609 break;
nuclear@6 610 case 2:
nuclear@6 611 col->z = v;
nuclear@6 612 break;
nuclear@6 613 }
nuclear@6 614 }
nuclear@6 615 return true;
nuclear@6 616 }
nuclear@6 617
nuclear@6 618 static bool parse_face(obj_face *face)
nuclear@6 619 {
nuclear@6 620 char *tok[] = {0, 0, 0, 0};
nuclear@6 621 face->elem = 0;
nuclear@6 622
nuclear@6 623 for(int i=0; i<4; i++) {
nuclear@6 624 if((!(tok[i] = strtok(0, SEP)) || !is_int(tok[i]))) {
nuclear@6 625 if(i < 3) return false; // less than 3 verts? not a polygon
nuclear@6 626 } else {
nuclear@6 627 face->elem++;
nuclear@6 628 }
nuclear@6 629 }
nuclear@6 630
nuclear@6 631 for(int i=0; i<4; i++) {
nuclear@6 632 char *subtok = tok[i];
nuclear@6 633
nuclear@6 634 if(!subtok || !*subtok || !is_int(subtok)) {
nuclear@6 635 if(i < 3) {
nuclear@6 636 return false;
nuclear@6 637 }
nuclear@6 638 face->v[i] = INVALID_IDX;
nuclear@6 639 } else {
nuclear@6 640 face->v[i] = atoi(subtok);
nuclear@6 641 if(face->v[i] > 0) face->v[i]--; /* convert to 0-based */
nuclear@6 642 }
nuclear@6 643
nuclear@6 644 while(subtok && *subtok && *subtok != '/') {
nuclear@6 645 subtok++;
nuclear@6 646 }
nuclear@6 647 if(subtok && *subtok && *++subtok && is_int(subtok)) {
nuclear@6 648 face->t[i] = atoi(subtok);
nuclear@6 649 if(face->t[i] > 0) face->t[i]--; /* convert to 0-based */
nuclear@6 650 } else {
nuclear@6 651 face->t[i] = INVALID_IDX;
nuclear@6 652 }
nuclear@6 653
nuclear@6 654 while(subtok && *subtok && *subtok != '/') {
nuclear@6 655 subtok++;
nuclear@6 656 }
nuclear@6 657 if(subtok && *subtok && *++subtok && is_int(subtok)) {
nuclear@6 658 face->n[i] = atoi(subtok);
nuclear@6 659 if(face->n[i] > 0) face->n[i]--; /* convert to 0-based */
nuclear@6 660 } else {
nuclear@6 661 face->n[i] = INVALID_IDX;
nuclear@6 662 }
nuclear@6 663 }
nuclear@6 664
nuclear@6 665 return true;
nuclear@6 666 }
nuclear@6 667
nuclear@6 668 static const char *parse_map()
nuclear@6 669 {
nuclear@6 670 char *tok, *prev = 0;
nuclear@6 671
nuclear@6 672 while((tok = strtok(0, SEP))) {
nuclear@6 673 prev = tok;
nuclear@6 674 }
nuclear@6 675
nuclear@6 676 return prev ? prev : "";
nuclear@6 677 }
nuclear@6 678
nuclear@6 679 static bool find_file(char *res, int sz, const char *fname, const char *path, const char *mode)
nuclear@6 680 {
nuclear@6 681 FILE *fp;
nuclear@6 682 const char *beg, *end;
nuclear@6 683 int fnamelen = strlen(fname);
nuclear@6 684
nuclear@6 685 beg = path;
nuclear@6 686 while(beg && *beg) {
nuclear@6 687 end = beg;
nuclear@6 688 while(*end && *end != ':') {
nuclear@6 689 end++;
nuclear@6 690 }
nuclear@6 691
nuclear@13 692 int res_len = end - beg;
nuclear@13 693 char *pathname = (char*)alloca(res_len + fnamelen + 2);
nuclear@13 694 memcpy(pathname, beg, res_len);
nuclear@13 695 pathname[res_len] = 0;
John@14 696 if(res_len) {
John@14 697 strcat(pathname, "/");
John@14 698 }
nuclear@6 699 strcat(pathname, fname);
nuclear@6 700
nuclear@6 701 if((fp = fopen(pathname, mode))) {
nuclear@6 702 fclose(fp);
nuclear@6 703 strncpy(res, pathname, sz);
nuclear@6 704 return true;
nuclear@6 705 }
nuclear@6 706
nuclear@13 707 beg += res_len;
John@14 708 if(*beg == ':') beg++;
nuclear@6 709 }
nuclear@6 710 return false;
nuclear@6 711 }
nuclear@6 712
nuclear@6 713 static const char *dirname(const char *str)
nuclear@6 714 {
nuclear@6 715 static char buf[PATH_MAX];
nuclear@6 716
nuclear@6 717 if(!str || !*str) {
nuclear@6 718 strcpy(buf, ".");
nuclear@6 719 } else {
nuclear@6 720 strncpy(buf, str, PATH_MAX);
nuclear@6 721 char *ptr = strrchr(buf, '/');
nuclear@6 722
John@14 723 if(ptr && *ptr) {
John@14 724 *ptr = 0;
John@14 725 } else {
John@14 726 strcpy(buf, ".");
John@14 727 }
nuclear@6 728 }
nuclear@6 729 return buf;
nuclear@6 730 }